Structure constructed using precast members and method of constructing the same

ABSTRACT

The present invention provides a structure constructed using PC members and a method of constructing the structure. In the present invention, each of PC wall members ( 10 ) of PC walls ( 1 ) has connection reinforcing bars ( 11 ) at predetermined positions. Each of PC slab members ( 20 ) of PC slabs ( 2 ) has open reinforcing bars ( 21 ), which protrude from the PC slab member ( 20 ). Supporting molds ( 3 ) are mounted to the PC wall members ( 10 ) at positions just below the connection reinforcing bars ( 11 ), so that the PC slab members ( 20 ) are placed on the supporting molds ( 3 ), such that the connection reinforcing bars ( 11 ) are overlapped with the corresponding open reinforcing bars ( 21 ) in slab areas, and connection concrete ( 4 ) is cast at a construction site such that the connection reinforcing bars ( 11 ) and the open reinforcing bars ( 21 ) are embedded in the connection concrete ( 4 ), thus integrating the PC walls ( 1 ) and the PC slabs ( 2 ) with each other.

TECHNICAL FIELD

The present invention relates, in general, to the construction ofstructures, such as apartment buildings and office buildings, and, moreparticularly, to a structure constructed using PC (precast) members, inwhich PC walls and PC slabs are integrated with each other usingconnection concrete in slab areas, and a method of constructing such astructure.

BACKGROUND ART

Recently, a method of constructing a structure using PC members, whichare manufactured in a factory and carried to a construction site, wasproposed and has been effectively used at construction sites toconstruct apartment buildings and office buildings.

For example, a representative conventional technique pertaining to theconstruction of a structure using PC members was proposed in KoreanPatent Laid-Open Publication No. 1998-068760 (date: Oct. 26, 1998),which was entitled ‘COUPLING STRUCTURE BETWEEN PC WALL AND PC SLAB OFSTRUCTURE AND CONSTRUCTION METHOD THEREOF’.

In this conventional technique, lower PC wall panels, each of which hason the upper end thereof an upper connection part from which the ends ofwall reinforcing bars protrude upwards, are installed. Thereafter, ahalf PC slab panel is horizontally placed on the upper ends of theadjacent lower PC wall panels. At this time, mounting parts of slabreinforcing bars, which extend outwards from the opposite ends of thehalf PC slab panel, are coupled to the upper connection parts of theadjacent lower PC wall panels, thus integrating the half PC slab panelwith the lower PC wall panels. Subsequently, an upper PC wall panel iscoupled to the upper end of each lower PC wall panel. At this time, alower connection part, which is provided on the lower end of the upperPC wall panel, and from which the ends of wall reinforcing bars protrudedownwards, is overlapped with and welded to the upper connection part ofthe lower PC wall panel, thus integrating the upper PC wall panel withthe lower PC wall panel. At a construction site, fresh concrete is castin a reinforcing bar coupling portion, in which the connection parts andthe mounting parts are coupled to each other, and fresh concrete is caston the upper surface of each half PC slab panel to form an integratedlocation-cast concrete plate.

As such, in the technique disclosed in the above publication, the upperand lower connection parts of the wall reinforcing bars, which areembedded in the upper and lower PC wall panels, are integrated with eachother by welding in the overlapped state and are welded to the mountingparts of the slab reinforcing bars, which are embedded in the half PCslab panels. Thereafter, the reinforcing bar coupling portions, in whichthe upper and lower connection parts and the mounting parts are coupledto each other, are filled with concrete, and the location-cast concreteplates are formed on the upper surface of the half PC slab panels byapplying concrete thereon. Therefore, a structure having a relativelylarge space therein and having relatively few stories can be constructedusing only the PC walls and the PC slabs, without using separate postsor cross beams. Furthermore, the upper and lower PC wall panels and thehalf PC slab panel can be integrated with each other more securely, thusensuring the satisfactory strength of the structure.

However, the conventional technique has the following disadvantages.First, because the conventional technique has a complex construction, inwhich the upper and lower connection parts of the wall reinforcing barsof the upper and lower PC wall panels and the mounting parts of the slabreinforcing bars of the half PC slab panels are gathered at onejunction, that is, in the reinforcing bar junction, the work ofconstructing the PC walls and the PC slabs is more difficult, thusmarkedly reducing construction efficiency. In addition, it is difficultto completely pour fresh concrete into every portion of the reinforcingbar junction, at which the upper and lower connection parts of the wallreinforcing bars of the upper and lower PC wall panels and the slabreinforcing bars of the half PC slab panels are complicatedly coupled toeach other. Thus, an opening may be undesirably formed in thecross-section of the reinforcing bar junction, with the result that thestructural strength is decreased.

Second, the conventional technique uses a construction method in which,after the half PC slab panels are placed on the lower PC wall panels,the upper PC wall panels are coupled to respective lower PC wall panelscoupled to the PC slab panels. Therefore, from the lowermost story tothe uppermost story, the structure must be sequentially constructedusing the PC walls and the PC slabs one story after another. As aresult, there is a problem in that the time required to construct thestructure using the PC members is excessively increased.

DISCLOSURE OF INVENTION Technical Problem

Accordingly, the present invention has been made keeping in mind theabove problems occurring in the prior art, and an object of the presentinvention is to provide a structure constructed using PC members inwhich ranges of junctions between PC walls and PC slabs are dispersedinto areas of corresponding slabs, thus making construction easy andenhancing construction quality, and a method of constructing thestructure.

Another object of the present invention is to provide a structureconstructed using PC members, in which several stories of PC slabs canbe coupled to PC walls at the same time, so that construction can berapidly undertaken, thus reducing the construction time and costs,thereby realizing economical construction, and a method of constructingthe structure.

Technical Solution

In order to accomplish the above objects, in an aspect, the presentinvention provides a structure constructed using PC (precast) members,the structure being constructed by forming PC walls using PC wallmembers, which are placed upright at predetermined positions, and byforming PC slabs for partitioning floors using PC slab members, whichare horizontally provided between the PC wall members of the PC walls,wherein the PC wall members of the PC walls comprise a plurality ofconnection reinforcing bars, which horizontally protrude from the PCwall members at positions at which slabs, forming multiple stories, areconstructed, each of the PC slab members of the PC slabs is shorter thana distance between the PC walls and comprises open reinforcing bars,which protrude from edge surfaces of the PC slab member that areopposite each other in a longitudinal direction, and supporting moldsare mounted to the PC wall members at respective positions just belowthe connection reinforcing bars, which protrude from the PC wallmembers, so that the PC slab members of the PC slabs are placed on thecorresponding supporting molds such that the connection reinforcing barsof the PC wall members of the PC walls are overlapped with thecorresponding open reinforcing bars of the PC slab members of the PCslabs in slab areas, and connection concrete is cast at a constructionsite such that the connection reinforcing bars of the PC wall membersand the open reinforcing bars of the PC slab members are embedded in theconnection concrete, thus integrating the PC walls and the PC slabs witheach other through the connection concrete in the slab areas.

In another aspect, the present invention provides a method ofconstructing a structure using PC members through a process of formingPC walls using PC wall members, which are placed upright atpredetermined positions, and of forming PC slabs for partitioning floorsusing PC slab members, which are horizontally provided between the PCwall members of the PC walls, the method comprising: a PC wallconstructing step of consecutively placing upright the PC wall members,each having a plurality of connection reinforcing bars, whichhorizontally protrude from the PC wall member at a position at which thecorresponding PC slab member is coupled to the PC wall member, thusforming the PC walls; a support mold mounting step of removably mountingsupporting molds to the PC walls at positions just below the connectionreinforcing bars protruding from the PC wall members; a PC slabconstructing step of placing the PC slab members, each having openreinforcing bars that are shorter than a distance between the adjacentPC walls and protrude from opposite edge surfaces of the PC slabmembers, on the corresponding supporting molds, such that the openreinforcing bars of the PC slab members are overlapped with thecorresponding connection reinforcing bars of the PC wall members in slabareas, thus forming the PC slabs; and a connection concrete forming stepof casting connection concrete at a construction site such that theconnection reinforcing bars of the PC wall members of the PC walls andthe open reinforcing bars of the PC slab members of the PC slabs areembedded in the connection concrete in the overlapped state, so that thePC walls and the PC slabs are integrated with each other in the slabareas through the connection concrete.

Advantageous Effects

In a structure constructed using PC members and a method of constructingthe structure according to the present invention, connection reinforcingbars, which protrude from PC wall members of PC walls, and openreinforcing bars, which extend from PC slab members of PC slabs, areoverlapped and integrated with each other in slab areas by connectionconcrete, which is cast at a construction site. Therefore, the range ofa junction between each PC wall and the corresponding PC slab isprevented from being concentrated at one position, but is dispersed overthe area of the corresponding slabs. Thus, working conditions forconducting the operation of coupling the PC slabs to the PC walls areimproved, and construction efficiency is improved.

Furthermore, the range within which the connection reinforcing bars ofthe PC wall members and the open reinforcing bars of the PC slab membersare overlapped with each other is relatively large, so that connectionconcrete to be cast at a construction site can be fully and closelycharged into the reinforcing bar junction, thus preventing an openingfrom being formed in the cross-section of the reinforcing bar junction.Therefore, there is an advantage in that the structural strength of thejunctions between the PC walls and the PC slabs is enhanced.

In addition, in the present invention, the PC slabs are coupled to thePC walls by a construction method in which connection concrete is castat a construction site using supporting molds, which are removablymounted to the PC wall members of the PC walls at correspondingpositions, in a state in which the PC slab members of the PC slabs aresupported on the corresponding supporting molds. Hence, the PC slabmembers of the PC slabs can be coupled to the PC wall members of the PCwalls at the same time, so that the construction time can be markedlyreduced, and, as well, a process of installing wooden concrete forms,which is a major factor that increases the amount of work in theconventional technique, is not required when the PC slabs are coupled tothe PC walls, thus reducing the number of workers and constructioncosts.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partially broken front view of a structure constructed usingPC members, according to an embodiment of the present invention;

FIG. 2 is an enlarged sectional view of a circled portion “I” of FIG. 1;

FIG. 3 is an enlarged sectional view of a circled portion “II” of FIG.1;

FIGS. 4 and 5 are views showing connection reinforcing bars whichprotrude from a PC wall member, according to the embodiment of thepresent invention;

FIGS. 6 and 7 are views showing a modification of the connectionreinforcing bars which protrude from the PC wall member, according tothe embodiment of the present invention;

FIGS. 8 through 10 are views showing another modification of theconnection reinforcing bars which protrude from the PC wall member andshowing bolt holes, according to the present invention;

FIGS. 11 and 12 are views showing another modification of the connectionreinforcing bars which protrude from the PC wall member according to thepresent invention;

FIGS. 13 and 14 are views showing an iron wall connection frame providedon the PC wall member according to the embodiment of the presentinvention;

FIGS. 15 and 16 are views showing a modification of the iron wallconnection frame provided on the PC wall member according to theembodiment of the present invention;

FIGS. 17 and 18 are views showing another modification of the iron wallconnection frame provided on the PC wall member according to theembodiment of the present invention;

FIGS. 19 and 20 are views showing a PC slab member having openreinforcing bars, according to the embodiment of the present invention;

FIGS. 21 and 22 are views showing a modification of the open reinforcingbars of the PC slab member according to the present invention;

FIGS. 23 and 24 are views showing another modification of the openreinforcing bars of the PC slab member according to the presentinvention;

FIGS. 25 and 26 are views showing another modification of the openreinforcing bars of the PC slab member according to the presentinvention;

FIGS. 27 and 28 are views showing an iron slab connection frame providedon the PC slab member according to the embodiment of the presentinvention;

FIGS. 29 and 30 are views showing a modification of the iron slabconnection frame provided on the PC slab member according to theembodiment of the present invention;

FIGS. 31 and 32 are views showing another modification of the iron slabconnection frame provided on the PC slab member according to theembodiment of the present invention;

FIG. 33 is a sectional view of a PC slab member having stepped parts onlongitudinal opposite ends thereof, according to the present invention;

FIG. 34 is a sectional view of a PC slab member having inclined parts onlongitudinal opposite ends thereof, according to the present invention;

FIG. 35 is a sectional view of a PC slab member having staggered endparts on longitudinal opposite ends thereof, according to the presentinvention;

FIG. 36 is an exploded perspective view of a mold having a function as asupport, according to the present invention; and

FIGS. 37 through 41 are views illustrating a method of constructing astructure using the PC members according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, a structure constructed using PC (precast) membersaccording to a preferred embodiment of the present invention will bedescribed in detail with reference to the attached drawings.

The structure constructed using the PC members according to the presentinvention includes PC walls 1, each of which is constructed using PCwall members 10, PC slabs 2, each of which is constructed using PC slabmembers 20, supporting molds 3, which are removably mounted to the PCwall members 10 of the PC walls 1, and connection concrete 4, whichcouples the PC walls 1 to the corresponding PC slabs 2.

As shown in FIGS. 1 through 3, each PC wall 1 is constructed byconsecutively placing the PC wall members 10 on top of one another on acorresponding base 5, which is previously constructed at a givenconstruction position.

Every PC wall member 10 is a concrete plate body, which is produced in afactory. Each PC wall member 10 has connection reinforcing bars 11,which extend in horizontal directions, at every position at which thecorresponding PC slab member 20 is coupled to the PC wall member 10. Theconnection reinforcing bars 11 of each PC wall member 10 overlap withopen reinforcing bars 21 of the corresponding PC slab member 20 and areembedded at a construction site in connection concrete 4, which couplesthe PC wall 1 and the PC slab 2 to each other, thus forming a slab.

Here, of the PC walls 1, each of the PC wall members 10 of PC walls 1,which become inside walls, includes connection reinforcing bars 11,which horizontally extend through the PC wall member in oppositedirections, such that the PC slabs 2 are coupled to the PC wall onopposite sides of the PC wall. Furthermore, of the PC walls 1, each ofthe PC wall members 10 of PC walls 1, which become outside walls,includes connection reinforcing bars 11, which horizontally extend fromthe PC wall member in one direction such that the PC slab 2 is coupledto the inner surface of the outside PC wall.

As shown in FIGS. 4 and 5, in the embodiment of the present invention,the connection reinforcing bars 11 comprise upper and lower connectionreinforcing bars 111 and 112, which horizontally protrude from each PCwall member 10 and are arranged in widthwise directions. The upper andlower connection reinforcing bars 111 and 112 are overlapped with theopen reinforcing bars 21 of the corresponding PC slab member 20 of thePC slab 2 and are embedded in connection concrete 4 which is cast at aconstruction site to couple the PC wall 1 and the PC slab 2 to eachother, thus structurally reinforcing the connection concrete.

As shown in FIGS. 6 and 7, illustrating a modification of theembodiment, the connection reinforcing bars 11 comprise upper and lowerconnection reinforcing bars 111 and 112, which horizontally protrudefrom each PC wall member 10 and are arranged in widthwise directions,and each upper connection reinforcing bar 111 may have on the endthereof a bent part 113, which is curved downwards to form a hook shape.Alternatively, as shown in FIGS. 8 and 9, illustrating anothermodification of the embodiment, the connection reinforcing bars 11comprise upper and lower connection reinforcing bars 111 and 112, whichhorizontally protrude from each PC wall member 10 and are arranged inwidthwise directions, and both of the upper and lower connectionreinforcing bars 111 and 112 may have on the ends thereof bent parts113, which are bent at right angles.

As such, in the modifications, the bent parts 113 are formed on the endsof the connection reinforcing bars 11, so that the lengths to which theconnection reinforcing bars 11 protrude from the PC wall member 10 arereduced, thus making the PC wall member 10 easy to carry and handle.Furthermore, when the PC wall members 10 are moved, deformation of theconnection reinforcing bars 11 attributable to contact with otherobjects is minimized, and a worker is prevented from being injured bythe ends of the connection reinforcing bars 11.

As shown in FIGS. 8 through 10, each PC wall member 10 has a pluralityof bolt holes just below the connection reinforcing bars 11. Thesupporting mold 3 is mounted to the PC wall member through the boltholes by a bolt coupling method.

Here, an internal thread may be formed in each bolt hole 10 a, such thata bolt can be tightened into the bolt hole 10 a without a separate nut.

FIGS. 11 and 12 are views showing another modification of the connectionreinforcing bars. In this case, the connection reinforcing bars 11comprise stud bars 114, which protrude from the outer surface of the PCwall member 10 below the position at which the corresponding PC slabmember 20 is coupled to the PC wall member 10.

In detail, the connection reinforcing bars 11 according to thismodification comprise the stud bars 114, which perpendicularly protrudefrom the outer surface of the PC wall member 10, and a bearing bar 115,which crosses the stud bars 114. The stud bars 114 and the bearing bar115 are overlapped with the open reinforcing bars 21 of thecorresponding PC slab member 20 of the PC slab 2 and are embedded inconnection concrete 4, which is cast at a construction site, to couplethe PC wall 1 and the PC slab 2 to each other, thus reinforcing theconnection concrete 4 such that the connection concrete 4 can resistshear force generated by a vertical load.

Meanwhile, each PC wall member 10 includes an iron wall connection frame12, so that the adjacent PC wall members 10 can be consecutivelyconnected to each other through the iron wall connection frames 12 bybutt-jointing.

In the embodiment of the present invention, as shown in FIGS. 13 and 14,the iron wall connection frame 12 comprises a planar iron plate 121,which is integrally provided along the edge surfaces of each PC wallmember 10. Thus, the adjacent PC wall members 10 are coupled to eachother by butt-joint welding through the iron wall connection frames 12,which comprise the planar iron plates 121.

Here, a planar iron plate 121 that is relatively wide is provided underthe lower end of each of the lowermost PC wall members 10 of the PC wall1. The wide planar iron plates 121 are brought into close contact withand are securely fastened to the upper surface of the corresponding base5 by anchor bolts A in order to reliably support the PC wall 1 on thebase 5.

FIGS. 15 and 16 illustrate a modification of the iron wall connectionframe. In this modification, the iron wall connection frame 12 comprisesa planar iron plate 121, which is integrally provided along the edgesurfaces of each PC wall member 10. A plurality of depressions 10 b isformed in the edge surfaces of the PC wall member 10. Locking holes 122are formed through the part of the planar iron plate 121 correspondingto each depression 10 b at respective opposite positions with respect tothe lateral direction of the planar iron plate 121, so that lockingbolts 123 are tightened into the respective locking holes 122.

In the case of the iron wall connection frame 12 according to themodification, in a state in which the adjacent PC wall members 10 comeinto contact with each other through the planar iron plates 121, thelocking bolts 123 are inserted into the respective locking holes 122,which are disposed in the depressions 10 b of the PC wall members 10,and are tightened by locking nuts, so that the PC wall members 10 aresecurely coupled to each other.

Preferably, to reinforce the PC wall member 10, a covering iron plate124 is provided on the inner surface of each depression 10 b of the PCwall member 10. Furthermore, each of the parts of the planar iron plate121, which are disposed at a position corresponding to the correspondingdepression 10 b, is reinforced by a subsidiary iron plate 125, which isprovided at a central position in the depression 10 b to partition thespace in the depression 10 b into two portions.

FIGS. 17 and 18 illustrate another modification of the iron wallconnection frame. The iron wall connection frame 12 according to thismodification comprises a tension steel wire 126, which is insertedthrough the cross-sections of the PC wall members 10 in a widthwisedirection and is tightened at the opposite ends thereof by tighteningnuts 127.

That is, in the iron wall connection frame 12 according to thismodification, in the state in which the adjacent PC wall members 10 areplaced such that facing edge surfaces thereof are brought into contactwith each other, the tightening nuts 127 are tightened to the oppositeends of the tension steel wire 126, which is inserted through the PCwall members 10 in a widthwise direction, such that the tension steelwire 126 is tensioned. Thereby, the PC wall members 10 are securelycoupled to each other.

The PC slab 2 is supported on the supporting molds 3, which are fastenedto the PC wall members 10 just below the connection reinforcing bars 11,which protrude from the PC wall members 10 of the PC wall 1, and iscoupled to the PC wall 1 by connection concrete 4, which is cast at aconstruction site.

FIGS. 19 through 26 illustrate the arrangement of open reinforcing bars.Each PC slab member 20 is a planar plate, which is previouslymanufactured in a factory. The PC slab member 20 is shorter than thedistance between the PC walls 1, and the open reinforcing bars 21horizontally protrude from the opposite edge surfaces of the PC slabmember 20.

The open reinforcing bars 21 of each PC slab member 20 overlap with theconnection reinforcing bars 11, which protrude from the corresponding PCwall members 10 of the PC walls 1, and are embedded in connectionconcrete 4, which is cast at a construction site to couple the PC walls1 to the PC slab 2, thus forming a slab.

In the embodiment of the present invention, as shown in FIGS. 19 and 20,the open reinforcing bars 21 comprise upper and lower reinforcing bars211 and 212, which are partially embedded in the cross-section of the PCslab member 20 such that longitudinal opposite ends thereof are exposedfrom the longitudinal opposite edge surfaces of the PC slab member 20and are arranged in a widthwise direction. The upper and lowerreinforcing bars 211 and 212 overlap with the corresponding connectionreinforcing bars 11, which protrude from the PC wall members 10 of thePC walls 1, and are embedded in the connection concrete 4, which is castat a construction site, to couple the PC walls 1 to the PC slab 2 toeach other, thus structurally reinforcing the connection concrete.

Meanwhile, in a modification of the open reinforcing bars 21, as shownin FIGS. 21 and 22, the open reinforcing bars 21 comprise upper andlower reinforcing bars 211 and 212, which are partially embedded in thecross-section of the PC slab member 20 such that longitudinal oppositeends thereof are exposed from the longitudinal opposite edge surfaces ofthe PC slab member 20 and are arranged in a widthwise direction, and onekind of upper and lower reinforcing bar 211 and 212 may have on the endsthereof bent parts 213, which are curved into hook shapes.Alternatively, as shown in FIGS. 23 and 24, illustrating anothermodification, the open reinforcing bars 21 may comprise upper and lowerreinforcing bars 211 and 212, which are partially embedded in thecross-section of the PC slab member 20 such that longitudinal oppositeends thereof are exposed from the longitudinal opposite edge surfaces ofthe PC slab member 20 and are arranged in a widthwise direction, both ofthe upper and lower reinforcing bars 211 and 212 having on the endsthereof bent parts 213, which are bent at right angles.

As such, in these modifications, the bent parts 213 are formed on theends of the open reinforcing bars 21, so that the lengths to which theopen reinforcing bars 21 protrude from the PC slab member 20 arereduced, thus making it easy to carry and handle. Furthermore, when thePC slab members 20 are moved, deformation of the open reinforcing bars21 attributable to contact with other objects is minimized, and a workeris prevented from being injured by the ends of the open reinforcing bars21.

FIGS. 25 and 26 illustrate another modification of the open reinforcingbars 21. In this modification, the open reinforcing bars 21 compriseupper and lower reinforcing bars 211 and 212, which are partiallyembedded in the PC slab member 20 in horizontal directions such that thelongitudinal opposite ends thereof protrude from the PC slab member 20and are arranged in widthwise directions. The upper reinforcing bars 211are linearly oriented in horizontal directions, while some of the lowerreinforcing bars 212 are bent upwards.

As such, in the open reinforcing bars 21 according to this modification,the upper reinforcing bars 211, which are linearly oriented inhorizontal directions, and the lower reinforcing bars 212, which arebent upwards, are overlapped with the correspondingconnection-reinforcing bars 11, which protrude from the PC wall members10 of the PC walls 1, and are embedded in connection concrete 4, whichis cast at a construction site to couple the PC walls 1 to the PC slab2, thus reinforcing the connection concrete 4 such that the connectionconcrete 4 can resist shear force generated by a vertical load.

Meanwhile, each PC slab member 20 includes an iron slab connection frame22, so that the adjacent PC slab members 20 can be consecutivelyconnected to each other through the iron slab connection frames 22 bybutt-jointing.

In the embodiment of the present invention, as shown in FIGS. 27 and 28,the iron slab connection frame 22 comprises planar iron plates 221,which are integrally provided on respective edge surfaces of each PCslab member 20 that are opposite each other in the widthwise direction.Thus, the adjacent PC slab members 20 are coupled to each other bybutt-joint welding through the iron slab connection frames 22, whichcomprise the planar iron plates 221.

FIGS. 29 and 30 illustrate a modification of the iron slab connectionframe. In this modification, the iron slab connection frame 22 comprisesplanar iron plates 221, which are integrally provided on the edgesurfaces of the PC slab member 20 that are opposite each other in thewidthwise direction. A plurality of depressions 20 b is formed in theopposite edge surfaces of the PC slab member 20. Locking holes 222 areformed through the part of the planar iron plate 221 corresponding toeach depression 20 b at upper and lower positions with respect to thelateral direction of the planar iron plate 221, so that locking bolts223 are tightened into the respective locking holes 222.

In the case of the iron slab connection frame 22 according to themodification, in a state in which the adjacent PC slab members 22 comeinto contact with each other through the planar iron plates 221, thelocking bolts 223 are inserted into the respective locking holes 222,which are disposed in the depressions 20 b of the PC slab members 20,and are tightened by locking nuts, so that the PC slab members 20 aresecurely coupled to each other.

Preferably, to reinforce the PC slab member 10, a covering iron plate224 is provided on the inner surface of each depression 20 b of the PCslab member 20. Furthermore, each of the parts of the planar iron plate221, which are disposed at a position corresponding to the correspondingdepression 20 b, is reinforced by a subsidiary iron plate 225, which isprovided at a central position in the depression 20 b, to section thespace in the depression 20 b into two portions.

FIGS. 31 and 32 illustrate another modification of the iron slabconnection frame. The iron slab connection frame 22 according to thismodification comprises a tension steel wire 226, which is insertedthrough the cross-sections of the PC slab members 20 in a widthwisedirection and is tightened at the opposite ends thereof by tighteningnuts 227.

That is, in the iron slab connection frame 22 according to thismodification, in a state in which the adjacent PC slab members 20 areplaced such that facing ends thereof are brought into contact with eachother, the tightening nuts 227 are tightened to the opposite ends of thetension steel wire 226, which is inserted through the cross-sections ofthe PC slab members 20 in a widthwise direction such that the tensionsteel wire 226 is tensioned, so that the PC slab members 20 are thussecurely coupled to each other.

In the embodiment, although the PC slab members 20 have been illustratedas having planar opposite edge surfaces so that they can be integratedwith the connection concrete 4, which is cast at a construction site, ina coupling manner in which the planar edge surfaces of the PC slabmembers 20 and the connection concrete 4 are in contact with each other,the PC slab members 20 may be integrated with the connection concrete 4in the coupling manners shown in the following modifications. That is,as shown in FIG. 33, illustrating a modification of the coupling manner,the PC slab member 20 may have on the opposite ends thereof steppedparts 23, in each of which the upper part thereof protrudes outwards andthe lower part thereof is depressed, so that the PC slab member 20 isintegrated with the connection concrete 4, which is cast at aconstruction site, in a stepped type coupling manner.

Alternatively, as shown in FIG. 34, illustrating another modification ofthe coupling manner, the PC slab member 20 may have on the opposite endsthereof inclined parts 24, each of which is inclined downwards, so thatthe PC slab member 20 is integrated with the connection concrete 4,which is cast at a construction site, in a wedge type coupling manner.

As a further alternative, as shown in FIG. 35, illustrating anothermodification of the coupling manner, the PC slab member 20 may have onthe opposite ends thereof staggered end parts 25, in each of which theupper part thereof protrudes outwards, the middle part thereof isinclined downwards, and the lower part thereof is depressed, so that thePC slab member 20 is integrated with the connection concrete 4, which iscast at a construction site, in a staggered end type coupling manner.

Meanwhile, the supporting mold 3 is mounted to each PC wall member 10 ofthe PC wall 1 just below the connection reinforcing bars 11 of the PCwall member 10. The supporting mold 3 serves to support the PC slabmembers 20 and makes it possible to cast connection concrete 4 at aconstruction site.

In the embodiment of the present invention, as shown in FIG. 36, thesupporting mold 3 includes a plurality of support members 31, each ofwhich has a mounting plate 311, which is in contact with the PC wallmember 10 and has through holes 31 a therein. Each support member 31further has a support plate 312, which perpendicularly extends from themounting plate 311 and is supported by an inclined propping plate 313.The supporting mold 3 further includes a mold panel 32, which is seatedon the support plates 312 of the support members 31. The mold panel 32has a plate shape, which is relatively narrow and long, and longitudinalrods 321 are provided under the lower surface of the mold panel 32 onopposite sides of the longitudinal axis of the mold panel 32.

To assemble the supporting molds 3 with the PC wall member 10, themounting plates 311 of the support members 31 are placed on respectiveopposite surfaces of the PC wall member 10 such that the through holes31 a in the mounting plates 311 are aligned with the corresponding boltholes 10 a of the PC wall member 10. Thereafter, bolts B are insertedthrough the corresponding bolt holes 10 a and through holes 31 a and aretightened by respective nuts, thus fastening the support members 31 tothe PC wall member 10. Subsequently, the mold panels 32 are seated ontothe support plates 312 of the corresponding support members 31 using thelongitudinal rods 321 of the mold panels 32. As such, after thesupporting molds 3 have been assembled with the PC wall member 10, thePC slab members are placed on the corresponding mold panels 32 such thatthe connection reinforcing bars 11 of the PC wall member 10 areoverlapped with the open reinforcing bars 21 of the PC slab members 20.Furthermore, connection concrete 4 is cast on the mold panels 32, sothat the connection reinforcing bars 11 of the PC wall member 10 and theopen reinforcing bars 21 of the PC slab members 20 are embedded in theconnection concrete 4.

Here, after the connection concrete 4 has been completely cured, so thatthe PC wall 1 and the PC slabs 2 are completely integrated with eachother, the bolts B, which were used to mount the mounting plates 311 tothe PC wall 1, are loosened to remove the support members 31 and themold panels 32 from the PC wall 1 and the connection concrete 4, thusremoving the supporting molds 3.

Preferably, each support member 31 of the supporting mold 3 has a pairof holding pieces 314 on the support plate 312 thereof, so that one ofthe longitudinal rods 321 of the mold panel 32 is inserted into and heldby the holding pieces 314 of the corresponding support members 31, thuspreventing the mold panel 32 from being undesirably moved or removedfrom the support members 31.

As shown in FIGS. 1 and 2, in a state in which the connectionreinforcing bars 11 of the PC wall member 10 of the PC wall 1 areoverlapped with the corresponding open reinforcing bars 21 of the PCslab members 20 of the PC slab 2 in a slab area, connection concrete 4is cast at a construction site on the mold panels 32 of the supportingmolds 3, which are mounted just below the connection reinforcing bars 11of the PC wall member 10 of the PC wall 1, thus integrating the PC wall1 and the PC slabs 2 with each other in the slab area.

The connection concrete 4 is cast at a construction site by mixingaggregate, water and cement at an appropriate ratio. It is satisfactoryif the connection concrete 4 can ensure sufficient structural strengthto securely integrate the PC slab 2 to the PC wall after it iscompletely cured.

Hereinafter, a method of constructing a structure using the PC membersaccording to the embodiment of the present invention will be explainedin detail with reference to the attached drawings.

The method of constructing the structure using the PC members accordingto the present invention includes the step of constructing PC walls 1using PC wall members 10, the step of mounting supporting molds 3 to thePC walls 1, the step of placing PC slab members 20 on the supportingmolds 3 to construct PC slabs 2, and the step of casting connectionconcrete 4 such that the PC walls 1 and the PC slabs 2 are integratedwith each other in slab areas.

FIG. 37 illustrates the step of constructing the PC walls at presetpositions.

Each PC wall 1 is constructed by consecutively placing upright the PCwall members 10, which are manufactured using concrete in a factory andhave the connection reinforcing bars 11 horizontally protruding from thePC wall members 10 at positions at which the PC slab members 20 of thePC slabs 2 are coupled to the PC wall members 10, on the correspondingbase 5, which is previously installed at a preset position.

Here, of the PC walls 1, the PC walls 1 which are used as inside wallsare constructed by consecutively placing upright the PC wall members 10,which have the connection reinforcing bars 11, which comprise the upperand lower connection reinforcing bars 111 and 112, which horizontallyprotrude in opposite directions. Thereafter, the PC slabs 2 are coupledto the opposite surfaces of the PC walls 1, which become the insidewalls. Of the PC walls 1, the PC walls 1 which are used as outside wallsare constructed by consecutively placing upright the PC wall members 10,which have the connection reinforcing bars 11, which comprise the upperand lower connection reinforcing bars 111 and 112, which horizontallyprotrude in one direction. The PC slabs 2 are coupled to the innersurfaces of the PC walls 1, which become the outside walls.

Furthermore, the bolt holes 10 a are formed just below the connectionreinforcing bars 11, which horizontally protrude from the PC wallmembers 10, which are consecutively placed upright to form the PC walls1, so that the supporting molds 3 can be mounted to the PC wall members10 by bolting.

In the embodiment of the present invention, the adjacent PC wall members10 of each PC wall 1 have been illustrated as being integrally coupledto each other by butt-joint welding the iron wall connection frames 12,which comprise the planar iron plates 121, which are integrally providedalong the edge surfaces of the PC wall members 10, to each other.

Furthermore, the lowermost PC wall members 10 of each PC wall 1 have onthe lower edge surfaces thereof the planar iron plates 121, which arerelatively wide, and the wide planar iron plates 121 are placed on andare fastened to the corresponding base 5 by tightening anchor bolts Ainto the base 5 through the wide planar iron plates 121. Thus, thelowermost PC wall members 10 can be securely fastened to the base 5.

FIG. 38 illustrates the step of removably mounting the support-functionmolds 3 to the PC wall members 10 of the PC walls 1 at positions justbelow the connection reinforcing bars 11, which protrude from the PCwall members 10.

In the embodiment of the present invention, the supporting molds 3 aremanufactured and prepared in advance such that each includes the supportmembers 31, each of which has a mounting plate 311, which is in contactwith the corresponding PC wall member 10 and has the through holes 31 atherein, the support member 31 further having the support plate 312,which perpendicularly extends from the mounting plate 311 and issupported by the inclined propping plate 313, the supporting mold 3further including the mold panel 32, which is seated onto the supportplates 312 of the support members 31 and has a plate shape, which isrelatively narrow and long and is provided with longitudinal rods 321under the lower surface thereof on opposite sides of the longitudinalaxis thereof. The mounting plates 311 of the prepared supporting molds 3are disposed on opposite surfaces of the corresponding PC wall member 10of the PC wall 1 such that the mounting plates 311 are aligned with eachother and the through holes 31 a of the mounting plates 311 are alignedwith the corresponding bolt holes 10 a of the PC wall member 10.Thereafter, bolts B are inserted through the corresponding bolt holes 10a and through holes 31 a and are tightened by respective nuts, thusfastening the support members 31 to the PC wall member 10. Subsequently,the mold panels 32 are seated onto the support plates 312 of thecorresponding support members 31 such that the longitudinal rods 321 ofthe mold panels 32 are held by the holding pieces 314 of the supportplate 312.

As such, the supporting molds 3, which are mounted to the PC wall member10, serve to make it possible to place the PC slab members 20 on thecorresponding mold panels 32 such that the connection reinforcing bars11 of the PC wall member 10 are overlapped with the open reinforcingbars 21 of the PC slab members 20, and to cast connection concrete 4 onthe mold panels 32 such that the connection reinforcing bars 11 of thePC wall member 10 and the open reinforcing bars 21 of the PC slabmembers 20 are embedded in the connection concrete 4.

Thereafter, the connection concrete 4 is cured until the PC wall 1 andthe PC slabs 2 are completely integrated with each other. After theconnection concrete 4 has been completely cured, the bolts B, which havemounted the mounting plates 311 to the PC wall 1, are loosened to removethe support members 31 and the mold panels 32 from the PC wall 1 and theconnection concrete 4. Ultimately, the supporting molds 3 are removedfrom the PC wall 1.

FIG. 39 illustrates the step of placing the PC slab members 20 on thesupporting molds 3 to install the PC slabs 2.

To install the PC slabs 2, the PC slab members 20, each of which has theopen reinforcing bars 21, which comprise the upper and lower reinforcingbars 211 and 212, which are shorter than the distance between theadjacent PC walls 1 and protrude from the opposite edge surfaces of thePC slab members 20, are placed on the corresponding supporting molds 3,such that the open reinforcing bars 21 of the PC slab members 20 areoverlapped with the corresponding connection reinforcing bars 11 of thePC wall members 10 in the slab areas.

In the embodiment of the present invention, to construct each PC slab 2,the adjacent PC slab members 20 have been illustrated as beingintegrally coupled to each other by butt-joint welding the iron slabconnection frames 22, which comprise the planar iron plates 221, whichare integrally provided on the opposite edge surfaces of the PC slabmembers 20, to each other.

FIG. 40 illustrates the step of casting connection concrete 4 at aconstruction site to integrate the PC slabs 2 to the corresponding PCwalls 1.

In the state in which the open reinforcing bars 21 of the PC slabmembers 20 are overlapped with the corresponding connection reinforcingbars 11 of the PC wall members 10 in the slab areas, connection concrete4 is cast on the mold panels 32 of the supporting molds 3 at theconstruction site and is cured, thus integrating the PC slabs 2 to thePC walls 1 in the slab areas.

After the connection concrete 4, which is cast at the construction site,is completely cured and the PC slabs 2 are thus completely integratedwith the PC walls 1, the supporting molds 3 are removed from the PCwalls 1 and the connection concrete 4, thus completing the structureshown in FIG. 41.

Although the preferred embodiment of the present invention has beendisclosed for illustrative purposes, those skilled in the art willappreciate that various modifications, additions and substitutions arepossible, without departing from the scope and spirit of the inventionas disclosed in the accompanying claims.

INDUSTRIAL APPLICABILITY

As described above, in the present invention, connection reinforcingbars of PC wall members and open reinforcing bars of PC slab members areoverlapped and integrated with each other in slab areas by connectionconcrete, which is cast at a construction site. Therefore, the range ofa junction between each PC wall and the corresponding PC slab isdispersed over the area of the corresponding slabs. Thus, workingconditions for conducting the operation of coupling the PC slabs to thePC walls are improved, and construction efficiency is improved.

Furthermore, connection concrete can be fully and closely charged intothe reinforcing bar junction, so that an opening is prevented from beingformed in the cross-section of the reinforcing bar junction. Therefore,the structural strength of the junctions between the PC walls and the PCslabs can be enhanced.

In addition, the PC slabs are coupled to the PC walls by a constructionmethod in which connection concrete is cast at a construction site usingsupporting molds. Hence, the PC slab members of the PC slabs can becoupled to the PC wall members of the PC walls at the same time, so thatthe construction time can be markedly reduced, and, as well, a processof installing wooden concrete forms is not required when the PC slabsare coupled to the PC walls, thus reducing the number of workers andconstruction costs.

1. A structure constructed using PC (precast) members, the structurebeing constructed by forming PC walls using PC wall members, which areplaced upright at predetermined positions, and by forming PC slabs forpartitioning floors using PC slab members, which are horizontallyprovided between the PC wall members of the PC walls, wherein the PCwall members of the PC walls comprise a plurality of connectionreinforcing bars, which horizontally protrude from the PC wall membersat positions at which slabs, forming multiple stories, are constructed,each of the PC slab members of the PC slabs is shorter than a distancebetween the PC walls and comprises open reinforcing bars, which protrudefrom edge surfaces of the PC slab member that are opposite each other ina longitudinal direction, and supporting molds are mounted to the PCwall members at respective positions just below the connectionreinforcing bars, which protrude from the PC wall members, so that thePC slab members of the PC slabs are placed on the correspondingsupporting molds such that the connection reinforcing bars of the PCwall members of the PC walls are overlapped with the corresponding openreinforcing bars of the PC slab members of the PC slabs in slab areas,and connection concrete is cast at a construction site such that theconnection reinforcing bars of the PC wall members and the openreinforcing bars of the PC slab members are embedded in the connectionconcrete, thus integrating the PC walls and the PC slabs with each otherthrough the connection concrete in the slab areas.
 2. The structureconstructed using the PC members according to claim 1, wherein theconnection reinforcing bars comprise upper and lower connectionreinforcing bars, which horizontally protrude outwards from each of thePC wall members and are arranged in a widthwise direction, wherein eachof the upper connection reinforcing bars has on an end thereof a bentpart, which is bent downwards to have a hook shape.
 3. The structureconstructed using the PC members according to claim 1, wherein theconnection reinforcing bars comprise upper and lower connectionreinforcing bars, which horizontally protrude outwards from each of thePC wall members and are arranged in a widthwise direction, wherein eachof both (of the) upper and lower connection reinforcing bars has on anend thereof a bent part, which is bent at a right angle.
 4. Thestructure constructed using the PC members according to claim 1, whereineach of the PC wall members has therein a plurality of bolt holes atpositions just below the connection reinforcing bars such that thesupporting molds are mounted to the PC wall member by bolting.
 5. Thestructure constructed using the PC members according to claim 4, whereinan internal thread for bolting is formed in each of the bolt holes. 6.The structure constructed using the PC members according to claim 1,wherein the connection reinforcing bars comprise stud bars, whichprotrude from an outer surface of the PC wall member below a position atwhich the corresponding PC slab member is coupled to the PC wall member.7. The structure constructed using the PC members according to claim 1,wherein each of the PC wall members comprises an iron wall connectionframe.
 8. The structure constructed using the PC members according toclaim 7, wherein the iron wall connection frame comprises a planar ironplate, which is integrally provided along edge surfaces of the wall PCmember.
 9. The structure constructed using the PC members according toclaim 7, wherein the iron wall connection frame comprises a planar ironplate, which is integrally provided along edge surfaces of the wall PCmember, and locking holes are formed through a part of the planar ironplate, which corresponds to each of depressions formed in the edgesurfaces of the PC wall member, at respective opposite positions withrespect to a lateral direction of the planar iron plate, so that lockingbolts are tightened into the respective locking holes.
 10. The structureconstructed using the PC members according to claim 7, wherein the ironwall connection frame comprises a tension steel wire, which is insertedthrough cross-sections of the PC wall members in a widthwise directionand is tightened at opposite ends thereof by tightening nuts.
 11. Thestructure constructed using the PC members according to claim 1, whereinthe open reinforcing bars comprise upper and lower open reinforcingbars, which are partially embedded in a cross-section of the PC slabmember such that longitudinal opposite ends thereof are exposed from thelongitudinal opposite edge surfaces of the PC slab member and arearranged in widthwise directions, wherein one of the upper and loweropen reinforcing bars has on the end thereof a bent part, which is bentdownwards to have a hook shape.
 12. The structure constructed using thePC members according to claim 1, wherein the open reinforcing barscomprise upper and lower open reinforcing bars, which are partiallyembedded in a cross-section of the PC slab member such that longitudinalopposite ends thereof are exposed from the longitudinal opposite edgesurfaces of the PC slab member and are arranged in widthwise directions,wherein each of both (of the) upper and lower open reinforcing bars hason the end thereof a bent part, which is bent at a right angle.
 13. Thestructure constructed using the PC members according to claim 1, whereinthe open reinforcing bars comprise upper and lower open reinforcingbars, which are partially embedded in a cross-section of the PC slabmember such that longitudinal opposite ends thereof are exposed from thelongitudinal opposite edge surfaces of the PC slab member and arearranged in widthwise directions, wherein the upper open reinforcingbars are linearly oriented in horizontal directions, and some of thelower open reinforcing bars are bent upwards.
 14. The structureconstructed using the PC members according to claim 1, wherein each ofthe PC slab members comprises an iron slab connection frame.
 15. Thestructure constructed using the PC members according to claim 14,wherein the iron slab connection frame comprises planar iron plates,which are integrally provided on respective edge surfaces of each of thePC slab members that are opposite each other in the widthwise direction.16. The structure constructed using the PC members according to claim14, wherein the iron slab connection frame comprises planar iron plates,which are integrally provided on respective edge surfaces of each of thePC slab members that are opposite each other in the widthwise direction,and locking holes are formed through a part of each of the planar ironplates, which corresponds to each of depressions formed in the edgesurfaces of the PC slab member that are opposite each other in thewidthwise direction, at respective upper and lower positions withrespect to a lateral direction of the planar iron plate, so that lockingbolts are tightened into the respective locking holes.
 17. The structureconstructed using the PC members according to claim 14, wherein the ironslab connection frame comprises a tension steel wire, which is insertedthrough cross-sections of the PC slab members in a widthwise directionand is tightened at the opposite ends thereof by tightening nuts. 18.The structure constructed using the PC members according to claim 1,wherein each of the PC slab members has, on opposite ends thereof in thelongitudinal direction, stepped parts, in each of which an upper partthereof protrudes outwards and a lower part thereof is depressed. 19.The structure constructed using the PC members according to claim 1,wherein each of the PC slab members has, on opposite ends thereof in thelongitudinal direction, inclined parts, each of which is inclineddownwards.
 20. The structure constructed using the PC members accordingto claim 1, wherein each of the PC slab members has, on opposite endsthereof in the longitudinal direction, staggered end parts, in each ofwhich an upper part thereof protrudes outwards, a middle part thereof isinclined downwards, and a lower part thereof is depressed.
 21. Thestructure constructed using the PC members according to claim 1, whereineach of the supporting molds comprises: a plurality of support members,each having a mounting plate in contact with the corresponding PC wallmember, the mounting plate having through holes therein, a support plateextending from the mounting plate in a perpendicular direction, and aninclined propping plate for supporting the support plate; and a moldpanel seated onto the support plates of the support members, the moldpanel having a plate shape, which is narrow and long, with longitudinalrods provided under a lower surface of the mold panel on opposite sidesof a longitudinal axis of the mold panel.
 22. The structure constructedusing the PC members according to claim 21, wherein the supporting moldfurther comprises: a pair of holding pieces provided on the supportplate of each of the support members, so that one of the longitudinalrods of the mold panel is inserted into and held by the holding piecesof the support members.
 23. A method of constructing a structure usingPC members through a process of forming PC walls using PC wall members,which are placed upright at predetermined positions, and of forming PCslabs for partitioning floors using PC slab members, which arehorizontally provided between the PC wall members of the PC walls, themethod comprising: a PC wall constructing step of consecutively placingupright the PC wall members, each having a plurality of connectionreinforcing bars, which horizontally protrude from the PC wall member ata position at which the corresponding PC slab member is coupled to thePC wall member, thus forming the PC walls; a support mold mounting stepof removably mounting supporting molds to the PC walls at positions justbelow the connection reinforcing bars protruding from the PC wallmembers; a PC slab constructing step of placing the PC slab members,each having open reinforcing bars that are shorter than a distancebetween the adjacent PC walls and protrude from opposite edge surfacesof the PC slab members, on the corresponding supporting molds, such thatthe open reinforcing bars of the PC slab members are overlapped with thecorresponding connection reinforcing bars of the PC wall members in slabareas, thus forming the PC slabs; and a connection concrete forming stepof casting connection concrete at a construction site such that theconnection reinforcing bars of the PC wall members of the PC walls andthe open reinforcing bars of the PC slab members of the PC slabs areembedded in the connection concrete in the overlapped state, so that thePC walls and the PC slabs are integrated with each other in the slabareas through the connection concrete.